package csu.web.mypetstore.persistence.Impl;

import csu.web.mypetstore.domain.Product;
import csu.web.mypetstore.persistence.DBUtil;
import csu.web.mypetstore.persistence.ProductDao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

public class ProductDaoImpl implements ProductDao {
    private  static final String getProductByCategoryString=
    "SELECT PRODUCTID, NAME, DESCN as description, CATEGORY as categoryId FROM PRODUCT WHERE CATEGORY = ?";
    private  static final String getProductString=
    "SELECT PRODUCTID, NAME, DESCN as description, CATEGORY as categoryId FROM PRODUCT WHERE PRODUCTID = ?";
    private  static final String searchProductListString=
    "SELECT PRODUCTID, NAME, DESCN as description, CATEGORY as categoryId FROM PRODUCT WHERE lower(name) like ?";
    @Override
    public List<Product> getProductListByCategory(String categoryId) {
        List<Product> products=new ArrayList<Product>();
        try{
            Connection connection= DBUtil.getConnection();
            PreparedStatement preparedStatement=connection.prepareStatement(getProductByCategoryString);
            preparedStatement.setString(1,categoryId);
            ResultSet resultSet=preparedStatement.executeQuery();
            while ((resultSet.next())){
                Product product=new Product();
                product.setProductId(resultSet.getString(1));
                product.setName(resultSet.getString(2));
                product.setDescription(resultSet.getString(3));
                product.setCategoryId(resultSet.getString(4));
                products.add(product);
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e){
            e.printStackTrace();
        }
        return products;
    }

    @Override
    public Product getProduct(String productId) {
        Product product=new Product();
        try{
            Connection connection= DBUtil.getConnection();
            PreparedStatement preparedStatement=connection.prepareStatement(getProductString);
            preparedStatement.setString(1,productId);
            ResultSet resultSet=preparedStatement.executeQuery();
            if((resultSet.next())){
                product.setProductId(resultSet.getString(1));
                product.setName(resultSet.getString(2));
                product.setDescription(resultSet.getString(3));
                product.setCategoryId(resultSet.getString(4));
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e){
            e.printStackTrace();
        }
        return product;
    }

    @Override
    public List<Product> searchProductList(String keywords) {
        List<Product> products=new ArrayList<Product>();
        try{
            Connection connection= DBUtil.getConnection();
            PreparedStatement preparedStatement=connection.prepareStatement(searchProductListString);
            preparedStatement.setString(1,keywords);
            ResultSet resultSet=preparedStatement.executeQuery();
            while ((resultSet.next())){
                Product product=new Product();
                product.setProductId(resultSet.getString(1));
                product.setName(resultSet.getString(2));
                product.setDescription(resultSet.getString(3));
                product.setCategoryId(resultSet.getString(4));
                products.add(product);
            }
            DBUtil.closeResultSet(resultSet);
            DBUtil.closePreparedStatement(preparedStatement);
            DBUtil.closeConnection(connection);
        }catch (Exception e){
            e.printStackTrace();
        }
        return products;
    }
}
